NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation
Edition: Model Aviation - 1984/11
Page Numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 131, 132
NO OCR TEXT NO OCR TEXT Spectra Stunt mildly aerobatic model semi-symmetrical airfoil ailer ons Its sort powered slope machine versions Spectra use same fuse lage tail assembly radio installation can use same power system can take pick can build wings Spectra design represents lot lessons learned over nearly decade Electric flying structure designed specifically light same time strong needed durable can reasonable care survive season after season hundreds flights least six Spectras have built fellow modelers have proven highly successful trouble ever encountered proved result wing warp have just tuned-in Electrics let suggest go find back issues MA beginning September 1983 issue read 10-part series Electrics sure read new RC Electrics column began July column already contains plenty useful information applicable Spectra Electrics general can youre waiting Spectra plans arrive reading should provide reasonable acquaintance things Electric Spectra should get air newest model motive methods Im going assume readers pretty good builders relatively new Electrics text will discuss about models nature usual step-by-step assembly instructions find some aspect presentation seems thin hard understand dont forget check references given above Now youre switched lets get some particulars Fuselage Lets start describing design makeup call modi fied box fuselage concept de scribed detail March 1984 MA first unusual thing may notice motor mount shapely nose block requires some unusual easy assembly work accomplish plans photos should give pretty good idea deal July MA should remove doubt nose block motor mount functional good looking Just aft motor mount wiring compartment accessed remov ing air scoop-hatch motor can inserted area houses charging jack ON-OFF switch fuse damping resistor plenty room work everything Next line motor battery com partment defined strong form ers fore aft fuselage sides bottom wing place battery compartment also cooling chamber Air entering scoop flows compartment among indi vidual cells flows out through holes floor compartment designed hold up eight 12 Ah cells although often used number six radio compartment behind motor battery large enough hold variety radio systems lightest equipment recommended best per formance installations shown made using double-sticky-backed Velcro technique described January February 1984 issues course con ventional mounting methods may used remainder fuselage merely way connecting tail assembly everything else keeping pushrods out breeze structure shown does job adequate strength minimal weight nearly dif ficult build may appear first glance references have told its worth repeating very important build strong lightweight model struc tures Electric power Some quick-and-dirty slap-it-together tech niques everyone knows also very heavy think Electrics have failed fly satisfactorily because being too heavy other reason set tone Spectra fuselage struc ture weighs less 2% oz ready cover holds 11/2 lb power parts radio Tail assembly can held fuselage rubberbands favorite method glued simpler allsheet surfaces easily made can very light strong Two such completely covered ready fly assem blies weigh total 2% oz may notice simple sheet structure still lot pieces hard balsa end-grain caps add great deal strength warp resistance should omitted Neither should iron-on cloth shown omitted spruce used rubber-held option except eleva tor joiner always required rudder elevator hinged favorite hinging materialtape see April MA course can use own favorite method Wings optional Spectra wing choic es course determine nature plane flying versions shown 32 Model Aviation Spectra Stunt wing equipped capable sustained inverted flight seml-symmelrlcal arTuu ii maneuvers marginai outside ioops Spectra Sport has same size wing Spectra Stunt airfoil fiat-bottomed ailerons omitted its suited windy-weatherflylng Spectra Soar have built flown fly very well can choose appealing version build em Well look detail help choose First some comments multi-purpose Spectra concept basic airplane results longterm averaging accumulation model designs design experience Roughly means blend models Ive seen and/or flown over years version very safe configuration opinion offering virtually no opportunity anything go wrong some variation nominals given herein particular Spectra design utilizes time-honored set moments areas pretty much has fly well fuselage tail assembly constants offer nothing extra ordinaryno limits pushed Im satis fied reasonable wing configura tion strapped nominal fuselage tail will fly gratifyingly well nothing magical Soar airfoil long-proven glider favorite East section l21Ao flat-bottom type turbulators Im personally Soaring think section may have lost popularity recent years favor thinner smoother semi-symmetrical competi tion airfoils Soar airfoil shown plans flies model very well thermalling machine popu lar rendition Spectra Keystone RC Club KRC field routine 12 13 mm glider-type flying sounds appeal ing Soar version serious glider enthusiasts may like Soar idea prefer alterna tive wing sectionsomething suited experience part country Go ahead Just sure keep lightweight adequate strength mind use Sport designation mean Spectra wing moderate span no ailerons reasonable airfoil shown 10% thick flat bottom 50-in span section flies faster Soar version because thinner used higher wing loading combination therefore penetrates higher wind conditions Often have some misgivings about wind conditions given day take both Soar Sport wings fly ing field try both determine pleasurable circumstanc es As Soar section Sport sec tion invented Rather adopted having used several models going back 1950s illustrate versatility design fellow modeler built Sport-size wing Soar air foilan in-between Spectra Sport version actually makes best trainer bunch Stunt wing same size Sport wing configured ailerons semi-symmetrical section surface area Spectra Stunt capable sustained inverted flight rolling maneuvers some other neat things will also marginal outside loops stretch loop vertically letting gain some speed down leg can go over top after up leg extra flyability notwithstanding Spectra Stunt should thought hot ship Its Its size weihtand nominal power system described elsewhereresult fairly docile model still much maneuverable other ver sions must flown wing prop version much like slope soarer power assist wing provides great change pace experienced flier As assist sizing up own wing following table lists weights wings pictured article Wing Soar Status Finished framework Covered MonoKote Sport Framework Covered Monoote Stunt Framework Covered Monoote servo linkage no reason should able finish very close guidelines dont have individual compo nent weights several KRC-owned Spectras know average completed model weights very close within ounce two otherand Dont forget Light weight very important Dont expect lumber epoxy Electric together get best flight perfor mance satisfaction six dif ferent individuals KRCall varying skill experience including beginner pilotscan build successful Spectras minimal plans no text certainly can successful information Construction will cover some generali Weightties may help build better light ozer stronger Spectrasand other models 41too Almost construction done 6Ywith cyanoacrylate CyA adhesives use various brands both thin 3/thick kind Whenever use thin CyA 4AI use conjunction baking soda November 1984 33 YOUll W8flT TO DUIIO pecmra nour version wumn oig wing mm ruiexug inurnii rug p peals has forgiving flight qualities three versionsend most-built members Keystone RC Club Flights 1 21 3 mm normal 13 /4 52/3 6% what need enjoy three types c Tlylng iuseiage surfaces three different wings Youll need just set motor RC components pectra boar coming landing prop held horizontal position y BC-actuated prop stop its choice whether put fuse motor-battery circuit author notes everyone flies Electrics unfused likely fry motor least once Lets look some examples Spectra Most Spectras assembly can ac complished nicely thin CyA Exam ples include fuselage formers up rights top bottom sheeting cap strips Its also used wing joints such rib leading edge LE trail ing edge TE bottom center sheeting tip assembly joints get dose baking soda first example LE dusted stuff rib ends dipped soda box prior placing against LE drop CyA placedphoofinstant con crete course joint fit must good Another example former up right cap strip fitting fuselage Everything gets rub baking soda Left Fussiage construction weii underway Au pieces give appearance being compilcated Its reaiiy its easy simple pianned technique sequence plus cyanoacryiate CyA glues Obtaining iightweight strong structure essentiai Top Right Nose biock compieted ply liner shown CyA-giued fuseiage side sheets Triangle stock 1/sX 1/4 hatch doubiers vialbie Right side shorter ieft impart thrust offset Assembiy guide strips 1/s sq previously CyA-giued oversized biock wili trimmed oft excess block Above Right hatch tak ing shape though stiii needing trimming/sanding Nose biock has niceiy faired-in thin CyA resulting joints light strong use thick CyA locations little extra fitting time needed Ex amples include edge-gluing stabil izer sheets end grain caps wing spar webs top spars wing planking have found advisable use soda thick CyA Whatever adhe sive used nothing beats close-fitting joint Spectra has two places epoxy used dihedral joints center dihedral joints made center section planking complete ly place sanded flat correct angle two roots coated slow-curing epoxy allowed soak 15 20 mm new batch mixed joint fitted gives super-strong joint other use epoxy nose block assembly case large areas involved time need ed get good uniform coat adhe sive other hand block itself attached fuselage CyA Always try select wood accordance intended use example /6 balsa bottom fuselage sheeting should cut same sheet floor under motor battery should cut very hard balsa remainder bottom sheeting can much lighter Some other examples include use hard balsa end-grain caps light sheet tail surfaces harder wing wood should used closer centerlight er toward tips concept wing wood spars ribs etc LE nose block material should general ly light good carving qualities special part construction re quired fuselage reinforce inside battery box cut lightweight cloth strips about 1 wide coat white yellow glue plaster 34 Model Aviation N B WUUU DVI-IaflKLWPK11ANSkR IRLt MAN IVE HAD FL IM Y- THATS THE CAPTAINS 7 HES RERE-ALLThE MXEL57WHAT WITH S MIDGET GIRLS FlNDIN8 OUT WHO 71fl5 CRAZY ATI5T7 WHATS HE 4 ARE IN l KNO#-YVURE ON YU EXPECT AMA MEMBERS 7 CHIPCREEP IS THAT SNOOPING AROUND THE WORKS iVUR INvI6IBLEIICI RUNT SWALLOW TI-IAT STUFFANDWI4AT HAFTA DRAW SODANG ORME NO DOUBT WELL SO LISTEN UP JUST WI4EREJD T DEFECT FROM-YOU ANALIEN MUCH OF THESE DAYS! IM VAN SM YOU CO ME FM JWI4ATSTHS UO N ~WHATS YOUR GAAE~ THE COLUMBIA NW~ of CLARI ________I 3/32K 1/4 BALSA EDGE 3/32 MED SHEET BALSA f 1/4 TRLANGLESM HORN ______________________EH SIDEI /I3/32 7z4"66]SPRIXE ____________REAR SPAR 1/32 PLY WING JONER j 3/16DOVVEL HOLD IXWN I/BK /4 WING 1/8 DOWEL HOLD DOViRJS I/8X 1/4 TAIL BEAMS 2 1/16 SHEET BALSA SIDES ONLY 3/32K 1/4 SPRUCE JOINI 3/32 1/4 HARD BALSA 1/16 SCOOP GWER 3/850- BLOCKS CUT AS DUCTING VI6 GUIDES 3/16BALSA BLOCKS MOTOR TUBE INSIDE BALSA NOSE COWL NYLON BRACKETS MOUNT MOTOR I/16X 1/4 BALSA FLAT LONGERONS TOP AND BOTTOM C I/8XI/4FORMERI/16X I/4CROSS CAPS 1A6WEB 1/8 K 1/4 BALSA SRRS TCPAND BOW 116 BALSA SHEET TCPAND BOTTOM TE AI/BSQTE ELECTRIC MOTOR SULU VAN GOWEN ROD BRASS CLIP I/4TRI CORNERS CAM OPERATED SWflCH 3/16oDAWMTUBE SIX I2AH CELLS AB I/8BALSA FORMERS I/16BO11OM PAL WITH VENT HOLES 1/850 SPAR DOUBLER 1DPANDBXTOM V16 BALSA RIBS V4X 3/B BALSA LE SKIDSSoar wing I/16SHEET LECOVER 7 I/8SOLE STRINGERS 1CP ONLY I/8SHEETTIP N 3/32 SHEET wet strips tightly corners battery box dry takes rather long time joints very strong durable battery heaviest concentration weight model reinforcement highly recommend ed glued-on cloth will cover part air exit holes hardened cloth I/B BALSAI/A BALSA ROOT RIBSHEETINGSPORT WiI i11 5Fl11I U-IIii4 IIAl IIit I3/TOP SPAR I4IIWSASPRECEjSOGBLER ENS I/SOOBLER ENS BOTTOM SPAS FJSPBR SCRELER Ii i OT 41I VIINOTE LL SPAR DOOBLERS -LARE I/H OS SPROCESIR BALSA WINS RIBS -I I-I/R SO SPRACE I/IS BALSA CENTER SECTION __________________________________ SHEETING SPORT WINS SIRESRAL SETAIL 6 10- 5/RI EACH PANEL I/H BALSA ROOT RIBSET ROOT RIB ST SLIGHT GiGGLE TO EASE BOTT SASSING ALL WINS VERSIONS IllI j77ff-]__ IIII IIIROT SOGBLE -I1ENSO HERE L TSP SOWLER --1~ ENOS HERE 4BOTTOM /K5 SPARWEB ENGS HI_II_ llOPOOIJBLPAj OSORLERHERE %ENGS HEREENOS HERE -f-U- -fr I/A 55 SPROCEI/B BALSA CAP 1/16 BALSA CENTER SECTION SHEETING 0/IC SOWELSOAR WINS SIHEGRAL BALSA BLOCK NOSENOSAME SN EACH PANEl WITH PLY TORE INSERTS FOR MOTOR EU I0 NOTE SISEN OWN THROSTAJFhrjFOAM Fl OVER FC IWoB XIS RALNA SEEEXTA FOSELAGE BOTTOR SRRA BALSASHEET AIR SOTLE RIAlET STRIPSI/ISs 0/IC TOSA VEARLESPROCE AIR SCOOPI/ISs 1/ I/IS BALSASASSLE TAPE NOSE FRONT SlEWI/B xI/4 I/ROI/ BALSA BALSA BLOCKIRON OS LOTH WRA PROPIA TRIAB STOP010CRtYESXIARPBHHJ I/H 55 BALSA MOTOR CONTROL os SWITCH easily cut shape holes sharp #11 blade cutting tools made brass tubing Also dont forget iron-on cloth Left Dihedral joint glued pinned curing Spectra Sport wing Note tightness butt joint fit end grain has double-epoxied super strength can see lain spruce doubler spars set ribs below top planking line Right Afterthe butt joint hascured cuta clearance notch forthe 1/16 plydoublernote lightening notches Coattheworkswlth epoxy slip doubler place snug fit best doubler depth less airfoil thickness balsa planking can replaced above below doubler replaced balsa will sand better therefore will look better plywood edges 36 Model Aviation Left Stack Spectra Soar wing ribs Note use scrap spar pieces hold ribs place ribs made smooth uniform sanding blocks Some ribs randomly placed have extra spar notches stub spars cut necessary num ber Right small wooden block aids installing ribs perpendicular work surface Hold rib proper position overthe planagainst block againstthe plan covering wax paper apply CyA glue technique can used models Looking Trom behind Spectra Soar wing note staggering sparwebbing stub spar spruce spar doublersgives strength its needed minimum weight Full-Size Plans Available. See Page 180 1/4 3/8 BALSA LEADING EDGE ---- -4 _ II -pif-I I/BO 1/4 II BALSA SPARSRI II SOP N BGT TIP G-GECT I/B BALGA SPAR 1/4GGGGET -/ SCRAPI/B BALSA BALSAROOT RIB EDOE SHEETING7 TLINT WlNC I/H GA BALSA ING EDGE F#IItzr4 II __L---rItv~44-bIIII- - / F-4I/3D PLY WING JOINERWING WEBS I4INS TALL AFTER DIHESAULEND WERE JOINT IS CORED SAMEI/So 1/4 IIICONOTRSCTION ON ALLSPRUCE TOP V--VERSIONS OF WINGSPAR TO RENS 1/4 CENTER SEC }SPAR TO HEREI/IA BALSA BALSA TO TIPSPRUCE ROT tFGREETINGBALGA TO TIPWING RIBS - I 3/IA 3/4 BALSA TE OTGCA WING WEBS VERY GRAIN DIHEDRAL WINGBREAR OR BALSA As 3/4 BALD TE WING TIP STOCK WITH I/B 1/4 GEE TEST SET RIB AT SPROCE CAP GLIGRT ANGLE I/B SO BALSA /1WB -_ ISPARII LIABALGAIBo 4 WING RIBS I BALSA SPARS SPARS BOTTOMTOP W NOT li LI SET RIBS AT SLIART ANGLE BARING ASSEMBLY S/S STUNT WINS DIHEDRAL DETAILI D 3/4 EACS PANELCENTER SEC OCRAPO1BSBEETI/OS 1/4 SPARSRIBS L E A DBLBSS/IBS S/U SPORT WINS RIB YE WING TIP CROSO SECTION 1/5 54BIBS BALSALS NA SPRURE I/US 7/IS--I/SSA \ A-- 4 OR BALGA WING TP SEE TEGY /K 1/IR BALSA SHEETOCRAP BALSA TRAILING EDGE WEBTOP B BOTTOM ENDS REREOR SD BALSA TE -SAND TO DRAPE lASS 1/4 BALSA EDGE TOP BOTTOMI/B 55OR DOWELORS/H BALSASTAB BALDBALSA DOWN OPTIONALI/BS I/H BALSA FILL FUSELAGE TOP VIEW3/3DS 1/4 S/IA DOWEL I/IAS/H BALSAHARD BALGA WING HOLDCROSS CAPS DOWNS/3D MED SOFTFINRUD BALSA GHEET OR PLYVIAS 1/4I/H TRIANGLE STOCK I/IA HARDBALGA EDGE GA SPRUCE BALSAI/IAS I/A BALGA3/30S I/O BALSA I/BOGFASE BOTTOM BALSAPLANKING ENDSN HERE FUSELAGE SIDE VIEW I/B OS BALSA GPRIGHTS I/B 5 1/4 BALSAI/B S I/H FORMER DOABLERSFUSELAGE SIDE GREETINGBALSA OMITTED FOR CLARITY EGITO ROTA3/30SI/4 GIDESBARD BALGA 3/IA SS/H BALSA AILERON I/IS GREETCENTER SEC I/U GAILS I/ASIB LESPARSI/U SO - --- S/IN 5 0/4 STUNT WING RIB AILERON STORY WINS1/4 BALSA IrisWBCA SADDLE FOR STUNT WINS ORS 1/4WEBSLB -OR 1/4 TOP 7 SPARSI/IS SOAR WING RIBSBEEO I/B VERY BARDAB BALSA OR LITEI/B HO BALSAORS I/H S/3D PLY BALSAN 3/3251/4 SHEETUPRUCE-DOUBLER LIGHT B AGE WITH ROBBER MOANTED TAIL ASSEMBLC ISTABILIZER * 3/30 0G OPRUCE II_________________________INLAY ___-~~S/-L-S/SDs RD BA 55 I____ S/SD MED SOPS BALSA SHEET OPTIONAL -TAPE HINBE SEE TEST SM BARN BAN ON CLOTH REIOF BOTH SIDES __ELEVATOR 3/3051/4S/3D BALSA BALSALIGHT SHEET PARTIAL LIST OF CURRENT SPRUCE IRON ON CLOTH REINFORCEMENT TOP N BOTTOM SPECTRAl MOTOR 3SOARLEISURE LOSS ASYSO BOO ACUT FULL GIZESPORTPAYTERS BIBS ROTA SIOSA FORMER IF7 B GLUE ORS I/HSTOREASTRO DOUR LESS 0 C TOP3I GLUE I/NSI/4 NJJJS CAT WINDOW INI TRAILING EDGE FORMER INST TO SCALE MOTORS - -- pHOOL TIOo PROPCELLS 645 EBA 23555 755 SS 54 NYCABJ TRWAB 707 YOUB MODEL AVIATION SPECTRA DESIGNED B DRAWN BY BOB KOPSKI TRACING BY JO DEMARCO ALL RIGHTS RESERVED reinforcement shown plans Use paper towel between iron material prevent getting goo iron Otherwise follow package direc tions usually just before start covering Wing construction mostly straightfor ward two notes may helpful Almost spar material Spectra balsa Portions spruce Most what call 55spar doublers spruce pieces installed against balsa spars near center Please notice doublers staggered lengthsthey end different rib stations prefer install after wing pnels built lifted plans Simply notch rib locations slip spruce placealong baking soda CyA Stunt wing has special item its own Its simple structure permits semi-symmetrical alrfoil sit flat fuselage wing saddle Its made two 1A-in balsa pieces cut aid wing rib template fit nicely Left Sharpen 020-in piece music wire use probe mark tip plate should trimmed Place wire across several ribs prick sheet balsa tip plate Trim outside resulting pinhole guideline modeling knife Finish tip plate long sanding block extends over several ribs careful sand wing ribs process November 1984 37 I/B BALSA TIP RIB -7 1/4 BALSA WING TIP PLATE -I/4 55 BALSA TRAILING EDGE Let Fin assembly set place stabilizer trial fit Note small notches stab trailing edge attaching rubberbands Mark location fin triangle stock edges stab point Marks will used guides fin glued after tail surfaces covered Center Spectra Stunt wing center section showing aileron mechanisms planking ribs cut after saddie strips covered black auto trim tape servo framing hard balsa installed front rear servo frames sunk deep wing Cut hole suit servo make sure clears rear fuselage battery box form er wing place Right Note skids bottom fuselage battery air exit holes exactly cell inter sections six cells eight-cell compartment Fill up unused space front battery foam block bottom center sheeting good seating wing saddle place watch spacing wing rub structure large sheet sand- Equipment installation Lets begin paper get good flat hence power system components havent already done begin getting good fit motor its mount As constructed motor mount should tad loose fitting Wrap motor housing tape two places gradually building up thickness motor slides mount just right Temporarily remove prop adapter position motor block about /l6 recessed very front nose Some photos show Orient motor mounting holes horizontally Place two Goldberg nylon angle brackets time position between motor plywood nose block liner undrilled leg angles rests motor other longer leg two holes already will stick out somewhat nose Carefully mark drill center nylon angle motor screws will Drill angle brackets -in bit centers recheck see indeed hit centers correctly start over trim holes just bit sharp #11 blade miss minimal hardware fitting just right Left front end shows two nylon angle brakets glued ply motor tube ana screwed io ne motor troni ena Deli ne prop stop top sideways view can seen retracted its aluminum exit tube Brass bent overthe two skid strips keepsthe strips tear ing loose Center Another installation view concentrating motor compartment Right radio compartment Note foam block between rudder elevator servos keep place Coat balsa model cement let dry before attaching stickytape 38 Model Aviation installation motorand radio components Radio components mounted using double stick Velcro described Parts 5 6 earlier MA series About Electrics remove motor rub some baking soda surface ply liner nylon angles will attached Score longer legs angles sand paper wipe clean some sol vent remove finger oils etc Reinstall motor angles motor screws making sure other angle sides press firmly against ply tube everything looks right drop little baking soda the two original angle holes falls ply liner Carefully add drop thin CyA making sure dont glue motor Remove motor screws motor dust glued sides angles edges baking soda preparatory adding CyA Carefully trim off excess nylon ends protrude beyond nose course motor always installed mount hatch opening way nylon brackets quite strong enough firmly hold motor under normal circumstances however will break away should mishap easier motor angles easily replaced know referenced series Electrics cov ered prop stop switch installation some detail Spectra follows references very closely some minor variations Ill cover have found Sullivan Golden Rod works very well application use smaller combinationred outer yellow inner use red outer tube run rear motor battery former front battery former However have found best outer tube use prop stop emerges fuselage 3A6-in OD aluminum hobby shop tubing much easier glue balsa holds up much better prop stopping lot stress going aluminum red tubes installed should about 3-in gap between end red side end aluminum tube gap switch located Two shorter pieces yellow inner rod joined 2-in length Sullivan threadedboth-ends rod cross-drilled wheel collar cam positioned un threaded middle coupler-rod stall various components hold lever switch approximately cor rect position good cam operation Mark switch mounting hole locations sticking pin through switch holes through balsa side guide marks will need enlarged small file gradual ly occasionally checking switch posi tion holes take shape should both slightly elongated vertically switch position can later fine-tuned up down holes switch easy thread 4-40 tap slowly carefully avoid cracking plastic switch housing switch can Continued page 131 Now Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios N pilot figures Perfect oldest newest next creation. give plane pilot FULL FIGURES 1/5 CIVILIAN$1295 1/4 CIVILIAN$1495 1/3 CIVILIAN$1995 NEW RELEASES 1/5 WWII US NAVY$1395 1/6 WWII US AAF$1195 712 CIVILIAN$895 specify airplane helicopter S2SO shipping figure oRDER YOURS TODAY William M Hawke 7148 Lasting Light Way columbia MD 21045 301 730-5596 $11995 wIth large lInear servos $12995 small rotary servos Seed 8Sf fer complete catalog 509 4872122 Free servo reversing Hobby Lobby radios included service work FCS4 Four Channel Radio Wider body ends aching shoulder muscles Angled f6r easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack I600mAH ft 1200mAH extral Expendable Full Command Systems 908 E Rosewood Spokane WA 99208 KNIGHTS PILOT BUSTS AND FULL FIGURES Scale Realism R/ C Aircraft Lightweight flexible super detailed NEW RELEASE I/S WWII US NAVY CIVILIAN BUSTS NOW AVAILABLE 1/3 1/4 $695 1/5 $495 $2OO shipping bust AT YOUR HOBBY SHOP November 1984 39 9 Steve Helms RADIO SOUT PRO HINGES Easiest Hinge Install - No pinning messy epoxyInstant glues needed v No special hinge slotter needed- No alignment necessary RC- $24SIpkg 18 le $449Ipkg 24 NOW AVAILABLE IN 1/4 SCALE SIZE torus cyanoacrylate adhesives 108 E Burgess Rd acola FL 32503 478-6745 plan has greatly reduced size allow printing two page spite extremely severe reduction can still read lettering majority magnifring glass makes severe cases readable book great browsing follow progress see way yearsa bit like some super Zaic Year book originals range weird incrediblehard believe modelers have created ingenuous birds basic volume contains 540 plans October 1963 through October 1979 Supplement No 1 adds plans through June 1981 Supplement No 2 updates January 1984 RCM sells item separately whole smear $20 Youll find details RCMs house ad books stuff Give plans guide effort Bill Winter 4426 Altura Ct Faifax VA 22030 SpectralKopski Continued page 39 held place two 4-40 screws through fuselage side CyA-glued wood first let harden minimize crushing under screw heads Leave yellow inner rods somewhat long until servo installation made proper operating lengths can determined coupled yellow inner rods should move freely within tube bearings point battery can set place Use some thin grocery carton foam plastic line sides battery box hold battery centered snugly over air exit holes Cut foam sheets needed clear red outer rod prop stop guide Depending number cells battery some foam may needed later front behind bat tery seen photos Other parts motor wiring may now planned Locate charging jack fuse used damping resistor etc liking refer MA Elec trics series ideas discussion wiring installations way its good idea make sure youre working discharged battery undertake electrical stallation safenot scorched good time pay close attention models balance installing radio gear big variable have some control over iasofar its influ ence overall balance discussions follow remember better slightly nose-heavy tail-heavy thing plane will fly forgiv ingly besides its easier achieve proper balance just little ballast tail lot nose starters just stick radio stuff radio compartment motor system installed temporarily assemble completed covered plane Check out balance can get clear indication distribute parts Remember point have yet installed pushrods add balancing consideration photos show things ar ranged Spectras built arti cle Chances yours will comparable youve gotten far youve come long way Electric Elationfirst time continuing successis virtually assured Get balance right special note pertains prop stop throttle servo gen erally advantageous have large servo arm throw use makes adjust ment timing electrical switch ing prop stop engagement much easier several degress freedom adjustability installation described have make work together Begin connecting throttle/propstop motor servo activating servo normal throw throt tle stick Adjust relative positions cam switch switching ON OFF happens during transmitter stick center-to-limit range center-toother-limit range reserved engage ment prop stop motor off What above trying say among COMPLETE THIS FORM AND ATFACH MAILING LABEL FROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING move please let us know advanceSIX weeks required change address Attach current MA mailIng label check appropriate box mall Subscrip tion Dept Model AviatiOn 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRiPTION 0 CHANGE OF ADDRESS Non-AMA subscriptIon rates $1800 12 months US possessions elsewhere Including Canada MexIco $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 710 MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 November 1984 131 Special Paper ~- Plastic Special Paper other things motor must running prop stop engaged should running prop stop retracted far enough con siderable comfortable range between Most models use Ace R/G glider skid case Spectra necessary cut skid material half two Y4-in-wide pieces arrange around air exit holes oper ation cutting can bit testy can done anchor skid material very securely very nose some /2-in-wide brass dont use such anchor skid will tear off no doubt case sure covering material securely stuck fuselage before stick ing skid material can done Ive using scheme years no problems flying field ground environment particularly harsh frequent tearing fuselage bottom covering occurs try running some auto trim tape stripes along fuselage bottom tape can big help trim looks good too Spectra completeready flyit should weigh somewhere tween 35 39 oz its over 40 youve done something will hurt its flying ability its under 35 please tell did weight range holds versions Spectra six 12 Ah cells Other batteries course can make big difference youve followed plans text have built surfaces warp-free fly ing should both snap pure pleas ure Launch straight out nose pointed little downward take Remember Electrics char acteristically fly wing prop Go easy up-elevator Fly what want horse Have happy quiet time May Electric Elation * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 PkJ2 Inserts Fine $225 $225 $195 $195 Radio TechniquslMyor Continued page 41 12 miles 10 kHz away inter fere didnt flew transmitter antenna totally collapsed unscrewed test hop showed machine flyable offered friends Santos Font fly Santos very cautious checking machine out complained about insuffi cient forward stick could see Santos moved Elevator trim Full Forward couple quick adjustments snaplinks failed satisfy him took machine back tailgate Ford further vestigation Thats discovered Elevator trim worked opposite stick Hmmm Further investigation revealed Rudder Rudder Trim Col lective Elevator could reversed Invert switch Elevator Trim Collective Trim File away memory banks Change Notice followed standard setup pro cedure Baron 20 blocked Teeter Arm Swash Plate perpen dicular main rotor mast set up links things parallel perpendicular another ap propriate servos energized transmitter both sticks centered Hover Mode trims set Neutral except Throttle Trim High main rotor pitch set 54 degrees Tail Rotor set tip difference 15 inches blades folded parallel settings obtained previous flights Using procedure machine trimmed liking first liftoff Santos tried improve trim discovered problem missed Santos moves Superior very abrupt ly wondered did course flying Baron 20 Santos told set Futaba transmitter Collective Pitch stayed 0 degrees way up half throttle creased rapidly havent figured out set Kraft up way fact done just opposite Col $8995 Shrpping Tex Res 8/o Pre-Built Fuselage Balsa Sheeted Foam Wings Totally Pre-Cut Fiberglass Cowl CJ ENTERPRISES 512 7830489 Rt 2 Box 238 M Pharr Texas 78577 lective pitch angle follow Throttle opening up halfway point fall behind producing less constantrpm situation above Hover setup pro duces much gentler control action think Realistic needs full Left Rudder land annoying other hand machine cant made jump up down way Santos Superior can Take choice possible could go lot technical data now doubt would find teresting KP7CH Mark IV radio works nicely since has op tions takes some concentrated study learn use everything got could use Channel Max module dont regret decision first thought Kraft Mk IV quite departure Airtronics CS-5H Helicopter radio discussed column June 1984 issue Airtronics system came good docu mentation followed book made everything seem simple Though have described Airtronics CS-5H basic Helicopter radio dont Want think unsophis ticated Helicopter radios sophisticated airplane radios have taken seriously Heli copter transmitter must mix Throttle Rudder Throttle/Collective Pitch requires two mixers five control channels ie must control five ser vos minimum Most add Gear Switch used control gyro ON/OFF switch between two levels sensitivity Thus Basic Helicopter Radio will have five user controls six active control channels added bit sophistication gives another thing learn point trying make about Airtronics Helicopter system gives you need leaves out some extras can extend beginners initial learning period instance cant adjust pitch curve electronically cant waste time misadjusting either Airtronics CS-5H has no shortage controls fact will find 39 con132 Model Aviation FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc PO Box 3786 Center Line Michigan 48015 responding advertisers mention read about Model Aviation